"Joanna Rohrback invented Prancercise – "A springy, rhythmic way of moving forward, similar to a horse's gait" – back in 1989, but it never caught on. Perhaps it's because she was so ahead of her time that she created an exercise video you couldn't follow unless you had some sort of portable video playback device.

Fortunately, the world has finally caught up with Rohrback and we can all "stop talkin' and do some walkin'."